Process of making primings (coatings) for transparencies or the like.



UNTTnn STATES PATENT @rrrcn.

FRANZ SCHERHAG, OF VIENNA, AUSTRIA-HUNGARY.

PROCESS OF MAKING PRIMINGS (COATINGS) FOR TRANSPARENCIES OR THE LIKE.

SPECIFICATION forming part of Letters Patent No. 712,728, dated November4:, 1902.

Application filed July 31, 1901. Serial No. 70,426. (No specimens.)

T0 at whom, it may concern.-

Be it known that I, FRANZ SGHERHAG, artist painter, a subject of theEmperor of Austria-Hungary, residing in XV Mariahilferstrasse170,Vienna,Austria-Hungary,have invented a Process of Making a Priming(Coating) for Transparencies or the Like; and I do hereby declare thefollowing to be a full, clear, and exact description of theinvention,such as will enable others skilled in the art to which it appertains tomake and use the same.

The subject of the present invention is a process for making a priming(coating) for the production of translucent pictures as a substitutionfor glass-paintings or transparencies, such as can be used for room orwin- (10wdecorations,translucentposters,(placardbills,)advertisement-boards, for window-settings, for materials for Chineselanterns, &c. Adaptable for this purpose is a thin threaded tissue withlarge meshes-such as muslin, bookmuslin, cambric, 850., made out ofsilk, cotton, linen, &c. stretched in a frame for preparation. Thistissue receives a first coating of a solution of Russian glue in water,being applied in as hot a condition as possible. After becoming dry asecond coating with a solution of gelatin, dextrine, (artificial gum,)or glycerin,and wood-vinegar in water is applied on the tissue and leftto dry. The following solutions have proved to be suitable for thepurpose: for the first solution, one hundred parts of water, twentyparts of Russian glue. For the second solution, one hundred parts ofWater, twentyfive parts of gelatin, four parts of dextrine,

(artificialgum,) or glycerin,two parts of wood vinegar. A hot coloringcomposition of chrome can be added to the last-named solution to renderthe glue and the glycerin insoluble in water. The result is that thespaces between the threads are after the drying filled out with atranslucent coat adaptable to be painted thereon with anilinwater-colors, (anilin colors soluble in water.)

A black oil-color or india-ink can be usedto make the outlinings.

The priming being supplied with the painting, which can be done by handor printed thereon, it is covered with linseed-oil varnish, (dryoil,)copal, or damar-lac varnish, making thus the painting insensible tomoisture, rain, 850;, and allows a wet cleaning of the same.

Instead of the above-stated coating, especially for cheap priming, thestretched stuff mentioned can be covered with linseed-oil varnish. Thepainting is then applied on the priming and secured against humiditythrough the lac-varnish cover above stated.

Having now particularly described and ascertained the saidinvention andin what manner the same is to be performed, I declare that what I claimis The process of treating an open-mesh fabric so as to make the samesuitable as a background for decorated objects which consists in firstapplying to said fabric a coating consisting of an adhesive substance,and then applying a coating consisting of a liquid translucent substancehaving water as its solvent and adapted to set to form a permanentcoating filling the meshes of said fabric, said lastnamed coating havinga chrome composition whose function is to impart color and insolubilityto the material forming said coating, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand.

FRANZ SOHERI-IAG.

